RR for incident psoriatic arthritis by body mass index in the general population
| Body mass index (kg/m2) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| <25.0 | 25.0–29.9 | 30.0–34.9 | ≥35.0 | p For trend | |||||
| Cases of psoriatic arthritis, N | 551 | 591 | 363 | 231 | − | ||||
| Incidence rate/10 000 person-years | 1.23 | (1.13–1.34) | 1.47 | (1.35–1.59) | 2.05 | (1.84–2.27) | 2.67 | (2.34–3.04) | <0.001 |
| Age- and sex-adjusted RR (95% CI) | 1.00 | (reference) | 1.17 | (1.04–1.32) | 1.60 | (1.40–1.83) | 2.01 | (1.72–2.34) | <0.001 |
| Multivariate RR (95% CI)* | 1.00 | (reference) | 1.17 | (1.04–1.31) | 1.57 | (1.38–1.80) | 1.96 | (1.68–2.29) | <0.001 |
↵* The multivariate adjusted model includes age, sex, smoking status, alcohol consumption and history of trauma.